Preliminary Investigation of the Systematics of &lt;I&gt;Didymodon&lt;/I&gt; (Pottiaceae, Musci) Based on nrITS Sequence Data

Werner, Olaf; Jiménez, Juan A.; Ros, Rosa M.; Cano, María J.; Guerra, Juan

doi:10.1600/0363644054782198

Cited by 33 publications

(23 citation statements)

References 29 publications

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“…The focus on key characters with a low phylogenetic component and high transition rates may explain why moss taxonomy, wherein (morpho)species polyphyly is the rule rather than the exception (Shaw, 2000;Shaw and Allen, 2000;Stech and Dohrmann, 2004;Stech and Wagner, 2005;Werner et al, 2005aWerner et al, , 2005b, is particularly unstable and vulnerable to phylogenetic testing (see Goffinet and Buck [20041 for a review). Ranker et al (2004) similarly found that the characters that have been traditionally used for taxonomy in grammitid ferns are among the most homoplastic, whereas other, potentially informative features have been regarded as having no taxonomic value or have been ignored.…”

Section: Consequences For Morphological Evolution In Brachytheciastrummentioning

confidence: 99%

Mapping Uncertainty and Phylogenetic Uncertainty in Ancestral Character State Reconstruction: An Example in the Moss Genus Brachytheciastrum

Vanderpoorten

Goffinet

2006

Systematic Biology

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The evolution of species traits along a phylogeny can be examined through an increasing number of possible, but not necessarily complementary, approaches. In this paper, we assess whether deriving ancestral states of discrete morphological characters from a model whose parameters are (i) optimized by ML on a most likely tree; (II) optimized by ML onto each of a Bayesian sample of trees; and (III) sampled by a MCMC visiting the space of a Bayesian sample of trees affects the reconstruction of ancestral states in the moss genus Brachytheciastrum. In the first two methods, the choice of a single- or two-rate model and of a genetic distance (wherein branch lengths are used to determine the probabilities of change) or speciational (wherein changes are only driven by speciation events) model based upon a likelihood-ratio test strongly depended on the sampled trees. Despite these differences in model selection, reconstructions of ancestral character states were strongly correlated to each others across nodes, often at r > 0.9, for all the characters. The Bayesian approach of ancestral character state reconstruction offers, however, a series of advantages over the single-tree approach or the ML model optimization on a Bayesian sample of trees because it does not involve restricting model parameters prior to reconstructing ancestral states, but rather allows a range of model parameters and ancestral character states to be sampled according to their posterior probabilities. From the distribution of the latter, conclusions on trait evolution can be made in a more satisfactorily way than when a substantial part of the uncertainty of the results is obscured by the focus on a single set of model parameters and associated ancestral states. The reconstructions of ancestral character states in Brachytheciastrum reveal rampant parallel morphological evolution. Most species previously described based on phenetic grounds are thus resolved of polyphyletic origin. Species polyphylly has been increasingly reported among mosses, raising severe reservations regarding current species definition.

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Section: Consequences For Morphological Evolution In Brachytheciastrummentioning

confidence: 99%

Mapping Uncertainty and Phylogenetic Uncertainty in Ancestral Character State Reconstruction: An Example in the Moss Genus Brachytheciastrum

Vanderpoorten

Goffinet

2006

Systematic Biology

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“…177. A molecular study byWerner et al (2005a) shows that previous sectional divisions of Didymodon cannot be maintained, but does not yet provide enough detail to demarcate new sections. 178.…”

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confidence: 99%

An annotated checklist of the mosses of Europe and Macaronesia

Hill¹,

Bell²,

Bruggeman-Nannenga³

et al. 2006

Journal of Bryology

523

297

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The moss flora of Europe and Macaronesia comprises 278 genera, 1292 species, 46 subspecies and 118 varieties. Of the total 1292 species, 53 are confined to Macaronesia and 21 are thought to be non-native. The checklist was derived from those for the various component countries and regions. It is based on results published up to the end of 2005. Subspecies and varieties are included; hybrids are omitted. The taxonomic hierarchy is based on one published by Goffinet & Buck in 2004. While it has been strongly influenced by results of modern molecular methods, there are still many remaining uncertainties, even at family level. Because of these uncertainties, taxonomic innovation has generally been avoided. There are four new combinations and one change of status.

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“…122 species accepted worldwide (Zander 1993;2007); six have now been recorded in New Zealand. Werner et al (2005) interpreted their molecular data as supporting the monophyly of the genus, contrary to the conclusion of Zander (1993) that the genus "is clearly heterogeneous", a conclusion in part based on its being "suspiciously heterogeneous in KOH colour reactions". This latter character thus becomes a useful identification tool at species level within Didymodon; it allows separation of D. novae-zelandiae (yellow) from two of its New Zealand congeners, namely D. torquatus (Taylor 1846: 50) Catcheside (1980 and D. weymouthii (both orange).…”

Section: Discussionmentioning

confidence: 74%

A new species of Didymodon (Pottiaceae, Bryophyta) and a key to New Zealand representatives of the genus

Beever

Fife

2016

Phytotaxa

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A new species of moss, Didymodon novae-zelandiae, is described and illustrated. A key is provided to the six New Zealand species of genus Didymodon, together with the single New Zealand species of the related genus Gymnostomum. The key distinguishing features of D. novae-zelandiae are its gymnostomous capsule with a mammillate operculum, and its diminutive size. This study is a contribution to the preparation of the eFlora of New Zealand, Mosses.

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Preliminary Investigation of the Systematics of <I>Didymodon</I> (Pottiaceae, Musci) Based on nrITS Sequence Data

Cited by 33 publications

References 29 publications

Mapping Uncertainty and Phylogenetic Uncertainty in Ancestral Character State Reconstruction: An Example in the Moss Genus Brachytheciastrum

Mapping Uncertainty and Phylogenetic Uncertainty in Ancestral Character State Reconstruction: An Example in the Moss Genus Brachytheciastrum

An annotated checklist of the mosses of Europe and Macaronesia

<p><strong>A new species of <em>Didymodon</em> (Pottiaceae, Bryophyta) and a key to New Zealand representatives of the genus</strong></p>

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